US2053997A - Combined electric switch and reserve fuse mounting - Google Patents

Description

Sept. 8, 1936. A, K EK 2,@53,937

COMBINED ELECTRIC SWITCH AND RESERVE! FUSE MOUNTING Filed April 19, 1935 2 Sheets-Sheet l ammo D Sept. 8, 1936. A. KRCEK 2,053,997

COMBINED ELECTRIC SWITCH AND RESERVE FUSE MOUNTING Filed April 19, 1935 2 Sheets-Sheet 2 Patented Sept. 8, 1936 I UNITED STATES PATENT OFFICE COMBINED ELECTRIC SWITCH AND RESERVE FUSE MOUNTING Anthony Krcek, McKeesport, Pa.

Application April 19, 1935, Serial No. 17,315

2 Claims. (01. 200-125) This invention relates to certain new and use- C t or eco d a ur fuses n engageful improvements in combined electric switch and merit; reserve fuse mounting. Figure 12 is a diagrammatic view of another The primary object of th i ti 1 t proarrangement of contacts in which the contacts 6 vide a combined electric switch and reserve fuse first and Second s s are in engagement; and

mounting wherein an enclosed switch box houses u e 13 s a fragmentary Perspective View O fuses arranged in any multiple desired, four of a P Of e Safety Switchsuch fuses being illustrated with two of the fuses The Combined e c Sw tc and reserve fuse active and two held in reserve to be placed in the mounting comprises a casing having a bottom circuit should either one of the previous active Well side Wells and end Walls l8 and 0 fuses becom damaged or b d t, and a cover wall 20 hinged as at 2| to the free With the above and other objects in view that edge of h e wall ll with a lock device associwill become apparent as the nature of the invenated With the e Swinging edge o e cove Wa tlon is better understood, the same consists in the and the free e of the Side wall I6.

novel form, combination and arrangement of- The casing is preferably of e a gu r 60n- 1b parts hereinafter more fully described, shown in Struetion and houses a ul r insu ation the accompanying drawings and claimed, plate 22 that is spaced from the bottom wall l5 In t drawings;- by depending end legs 23, the plate being anchored Figure 1 is a, top plan i of combined electo the bottom wall by means of bolts 24 or the tric switch and reserve fuse mounting in an enlike The plate 22 carries a series of contacts 20 closing casing with the cover of the casing in On its upper e as S ow in u e 10 open iti and 11, the contacts comprising pairs of trans- Figure 2 is a fragmentary end elevational view ly aligned Co t c S p 6 and 1-28. showing the position of the hand operated lever The Contact Strips 25 a d 26 C y lateral p 25 for th movably mounted fuses in one position jections 29 extending in the same direction with 25 with two of the four fuses in the circuit; an upstanding P d C tact 30 at the end of Figure 3 is a Similar fragmentary end e1eva each extension 29. Extensions 3| project in the tional view showing the hand lever in a reverse same direction from the inner ends of the 011- position t t other two of the f ur fu in tact strips 25 and 26 and laterally thereof with 30 the circuit; upstanding U-shaped contacts 32 at their outer 30 Figure 4 is a fragmentary end elevational view S Lateral extensions Project m the showing the hand lever in position with all fuses Inner e 9 the Contact SHIPS 27 and 23 m the out of the circuit with the cover f the casing same directions as the extensions 29 on the conreleased for Opening movement; tact strips 25 and 2B and each extension 33 carries Figure 5 is a fr gm tar plan View Showing an upstanding U-shapedcontact 34 aligned with 35 the manually operated cutmut of the circuit the contacts 30. Extens1ons 33 proJect laterally locked in its cutmut position; of the contact strips 21 and 28 intermediate their Figure 6 is an end elevational View of the ends and in the same direction as the extensions closing casing showing the lead-in wires and a on the Contact Sjmps 25 and 26 and each faxtenclamp device engaged with one of the wires to sion 35 carries at its outer endan upstanding U- 40 a1 d in the Support of the casing; shaped contact 36 that aligns w1th the contacts 32. Figure '7 is a vertical cross-sectional view taken i gg conquctotfi 31 fi i g on line L4 of Figure showing the operating 3211 18 sn z r e conr i t ed 2( the c ori t act 2mg):

ggg f'g sgzggg i i g i fsg giiiz gg fgg 25 and 26 respectively, the outlet conductors 38 45 extending from the contact strips 21 and 28 a aqcross'sectmnal taken on lme through openings I 9 in the bottom wall of the caso igure ing. As shown in Figure 6, a clamp device 39 i r 9 i a fr men ary side v nal View, hinged to the top wall l8 of the casing is adapted P y in Section Showing the 100k deviee for the to be moved into binding engagement with one 50 casing cover; of the-conductors 37.

Figure 10 is a diagrammatic view showing the A safety switch is associated with the contact contact for the first and third fuses in engagestrip 26 and has a lock device attached thereto ment; when the safety switch is in open position to Figure 11 is a diagrammatic view showing the break the flow of current through the switch box and to eliminate the danger of injury to an operator 'or repair man. As shown in Figures 1, 5 and 13, a switch plate 40 is pivotally supported on the insulation member 26a set into the interrupted contact strip 26 and when positioned as shown in Figure 1 is closed with current flowing through the contact strip. When it is desired to break the flow of current, the switch plate 40 is moved on its pivotal support and assumes the position shown in Figure 5. With the switch plate All-so disposed, the same is restrained from pivotal movement by means of the leg 42 of a bell crank lever that carries at its free end an abutment block 42a. shown in detail in Figure 13 with one face of the abutment block grooved as at 42b for engagement with the pin 4| rising from the switch plate 40. As shown more clearly in Figure 13, the other leg 420 of the bell crank lever carrying the abutment block 42a is adapted to be aligned with an arm 40a rising from the plate 22 and said arm and leg 420 have registering openings 42d for the passage of a shackle of a lock lla shown in Figure 5. It will therefore be seen that the switch plate 40 is locked in its circuit breaking position against accidental movement to closing position and with injury to the operator or repair man eliminated.

A ledge 43 rises from each side edge of the plate 22 above the support 23 and an insulation carrier plate 44 is slidably mounted on the ledges 43. As shown in Figures 1, '7 and 8, angle iron strips 45 are interposed between the upper and outer sides of the ledges 43 and the carrier plate M with the carrier plate secured to the angle iron strips 45 by means of fastening devices 56. The angle iron strips 45 have a pin and slot connection 41- with the ledges 63 to be limited and guided in their movements.

As shown inFigure 1, four fuses 48, d9, 50 andwith blade contacts depending from the carrier plate 44, the blade contacts associated with the contact strips 25 and 26 being designated by the reference characters 56, 51, 58 and 59, while the blade contacts associated with the contact strips 21, and 28 are designated by'the reference characters 60, 6! 62 and 63 as diagrammatically illustrated in Figure 10.

The carrier plate 44 is adapted to be shifted within the casing for placing the pairs of fuses 48-50 and 495| into the electrical circuit and to accomplish the sliding movement of the carrier plate 41, with the fuses thereon and the contact blades, there is provided a cross shaft 66 shown in Figure 7 as being journalled in the plate supports 23 and also in bearings 65 depending from the plate 22, the opposite ends of the shaft 64 being keyed as at 66 and having an arm 6'! fixed to each key portion with a' link 68 at the upper end of the arm that is pivotally connected at its outer end as at 69 to the angle iron strip 45 as shown in Figure 1. One keyed end of the shaft 66 extends through the side wall l6 of the casing and carries an operating handle 10.

A look device is associated with the casing and cover for holding the cover in locked position when either pair of fuses is in the circuit and as shown more clearly in Figures 7 and 9, an arm 'H is fixed to the adjacent keyed portion 66 of the shaft 64 and the free end thereof is socketed for the reception of a pin 72 that is spring pressed as at 1,3 to be projected from the upper end of r the arm H for reception in the recesses 14 the curved edge 15 of the plate 16 for holding the shaft 64 and carrier plate 44 in its shifted position. A pin ll projects laterally from the upper free end of the arm "H and works in a slot 18 in the side wall 16 of the casing and has its free end receivable in the opening 79 in the plate 80 that is secured to the inner face of the side wall l6 and which plate is spring pressed toward the the side wall l6 of the casing, the lower end of the latch 83 being slotted as at 85 with the pin 11 extending therethrough, the 1atch83 being selectively engageable at its upper end with the keeper hooks 86 carried by the cover 20.

When the cover 20 is closed on the casing, the apertured plate 88 isspaced from the pin 11 and when the handle 10 is positioned as shown in- Figure 4, the latch rod 83 is disengaged from the The latch 83 is moved on its pivot 84 when the arm H is shifted upon rotation of the shaft 64.

keeper hook 86 and the cover 20 can be readily 1 opened on its hinged connection with the casing for access tothe casing. With the parts so disposed, the blade contacts are spaced from the contacts 30 and 3G and atthis time, the circuit may be broken by moving the switch 46 from the position shown in Figure 1 to the positionshown in Figure 5 with the switch 40 locked in itsopen position by the device 42. The contacts depend-'- ing from the carrier plate 44 and rising from the plate 22 are so relatively positioned as to .place circuit. out, the handle 10 may be thrown'to either of the positions shown in Figures 2 and 3, and-a movements of blade contacts relative to the contact strips are illustrated in Figures 10 and ,11.

' either pair of fuses as'48--50 urea-5| in the Should one of the fuses of a pair burnt The contact strips and contact blades associated therewith may be so arranged as to cause the pair of fuses 68-49 and 505l to be selectively placed in the circuit as disclosed in Figure 12,

the contact blades 52a of the fuses 48 and 59 being positioned for engagement with the contacts 30a and 34a while the contact blades 52b ofthe fuses 50 and 5! are out of engagement with the contacts 32a and 36a.

From the above detailed description of theinvention, it is believed that the construction and operation thereof will at once be apparent and while there areherein shown and described the 7 preferred embodiments of the invention, it is nevertheless to be understood that minor changes may be made therein without departing from the spirit and scope of the invention as claimed.

I claim:- p 1. In a combined electric switch and reserve fuse mounting, a casing and hinged cover therefor, a fixed plate mounted in the casing in spaced 45 new pair of fuses placed in the circuit. The l with two of the fixed contacts, means operable exteriorly of the casing for moving the fuses, electric circuit wires in communication with the fixed contacts, the mounting for the fuses and movable contacts including a plate slidably supported at its opposite edges on the fixed plate and in spaced relation thereto, the movable contacts depending from the slidable plate, a journalled shaft extending across the casing beneath the fixed plate, and an upwardly extending arm and link connection between the ends of the shaft and the sliding plate.

2. In a combined electric switch and reserve fuse mounting, a casing and hinged cover therefor, a fixed plate mounted in the casing in spaced relation to the bottom wall thereof, fixed contacts rising from the upper face of the plate, four fuses movably mounted in the casing, a pair of contacts movable with each fuse and arranged with respect to the fixed contacts whereby a pair of the movable contacts is selectively engageable with two of the fixed contacts, means operable exteriorly of the casing for moving the fuses, electric circuit wires in communication with the fixed contacts, the mounting for the fuses and movable contacts including a slidable plate, ledges rising from opposite sides of the fixed plate, angle iron wear strips depending from opposite edges of the slidable plate and slidably supported on the ledges, pin and slot connections between the angle iron strips and ledges to limit movements of the sliding plate, a journalled shaft extending across the casing beneath the fixed plate, an arm fixed to each end of the shaft and rising therefrom, horizontal link connections between the upper ends of the arms and corresponding ends of the adjacent side portions of the angle iron strip for effecting sliding move-- ments of the sliding plate and coaction of the contacts.

ANTHONY KRCEK.

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